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Related Manuals for Emerson Copeland Scroll ZH 15 K4E
Summary of Contents for Emerson Copeland Scroll ZH 15 K4E
- Page 1 Scroll compressors for Dedicated Heat Pumps ZH15 K4E...ZH45 K4E...
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Page 2: Table Of Contents
™ ™ … … Introduction ................................2 Safety Instructions..............................2 Nomenclature...............................3 Application Envelope ............................3 Qualified Refrigerants ............................4 Lubrication................................4 Accumulators ...............................5 Crankcase Heaters ..............................5 Discharge Temperature Protection ........................5 Standard Motor Protection ...........................6 Low Ambient Cut-Out............................6 Pressure Controls ..............................6 Shut-Off................................6 Starting.................................6 Deep-Vacuum Operation .............................6 Brief Power Interruptions .............................6 Electrical Installation ............................7 High Potential Testing............................8... -
Page 3: Introduction
Introduction The Scroll compressor has been under development at Copeland since 1979 and is the most efficient and durable compressor Copeland has ever developed for air-conditioning and refrigeration. Copeland has now invested significant resources and carried out extensive testing to optimize a completely new range of ZH Scroll compressors for dedicated Heat Pump applications. -
Page 4: Nomenclature
Nomenclature The model numbers of Copeland Scroll™ compressors have been designed to include a coded nominal capacity at dedicated heat pump operating conditions. All heat pump scroll compressors are charged with Ester oil, which is indicated by the letter “E”. Model Designation Z H 26 K 4 E - TFD - 524 Z = Compressor family: Z = Scroll... -
Page 5: Qualified Refrigerants
Qualified Refrigerants R407C has been qualified for the compressor models ZH 15 K4E ... ZH 45 K4E. Lubrication The compressor is supplied with an initial charge of polyolester (POE) lubricant. In the field the oil level could be topped up with Mobil EAL Arctic 22 CC. The recharge values can be taken from Copeland Selection Software. Although there is no flexible mounting of the internal compressor parts, the number of start/stop cycles should be limited to 10 per hour. -
Page 6: Accumulators
Figure 3: Absorption of moisture in ester oil in comparison to mineral oil in [ppm] by weight at 25°C and 50% relative humidity. h = hours. Accumulators An accumulator is normally not required in dedicated heat pump applications. Durability is ensured by the Copeland Scroll’s inherent ability to handle liquid refrigerant in flooded start and defrost cycle operation. -
Page 7: Standard Motor Protection
10 Standard Motor Protection Conventional inherent internal line break motor protection is provided with models ZH15K4E to ZH45K4E. 11 Low Ambient Cut-Out A low ambient cut-out may be required for systems using air as a heat source. 12 Pressure Controls A high pressure cut-out may be required according to individual national regulations and is strongly recommended with three-phase compressors due to their capabilities of pumping to high pressures once the discharge is obstructed. -
Page 8: Electrical Installation
17 Electrical Installation Independently from the internal motor protection, fuses F6...8 have to be installed before the compressor as shown in Figure 8 and Figure 9. Selection of fuses has to be carried out according to VDE 0635 or DIN 57635 or IEC 269-1 or EN60-269-1. -
Page 9: High Potential Testing
18 High Potential Testing Copeland subjects all motor compressors to a high voltage test after final assembly. This is carried out according to IEC-34-1. Since high voltage tests lead to premature aging of the winding insulation we do not recommend additional tests of that nature. -
Page 10: Excessive Liquid Floodback
20 Excessive Liquid Floodback The following tests are for those Air/Water system configurations and charge levels, which need special testing to verify exemption from the need of an accumulator. 20.1 Continuous Floodback To test for excessive continuous liquid refrigerant floodback, it is necessary to operate the system in a test room at conditions where steady state floodback may occur (low ambient air/water heating). -
Page 11: Service
22 Service Copeland Scroll compressors have copper plated steel suction and discharge tubes. These tubes are far more robust and less prone to leaks than copper tubes used on other compressors. Due to the different thermal properties of steel and copper, brazing procedures may have to be changed from those commonly used. For brazing of the tubes see Figure 11 and the following procedures. -
Page 12: Shut-Off Valves And Adapters
25 Shut-off Valves and Adapters The Scroll compressors ZH15K4E to ZH45K4E are delivered with brazing connections. Rotalock type shut-off valves can also fit compressors with braze connections (by the mean of Rotalock adapters. Rotalock-shut-off valves are available for the suction as well as the discharge side (see Figure 12 & spare parts list “ZH”). Torque [Nm] Rotalock 1"-12UNF 70 –... -
Page 13: Unbrazing System Components
28 Unbrazing System Components If the refrigerant charge is removed from a scroll-equipped unit by bleeding the high side only, it is sometimes possible for the scrolls to seal preventing pressure equalization through the compressor. This may leave the low side shell and suction line tubing pressurized. - Page 14 Tel. +32 (0) 87 305411 - Fax +32 (0) 87 305506 - internet: www.ecopeland.com - email: [email protected] The Emerson logo is a trademark and service mark of Emerson Electric Co. Copeland Corporation is a division of Emerson Electric Co. Copeland is a registered trademark and Copeland Scroll is a trademark of Copeland Corporation.